Aussie slang is grouse mate

Is Australian slang on the decline? Recent report would suggest yes it is but is that really the case? Sure a lot of it was bought here by Irish and Cockney settlers and yes Shakespeare also gave us a lot of slang and it is true that some of those words aren't used as much. However new phrases are entering the lexicon. Phrases used by second generation Australians and Indigenous youth are now mainstream and new terms are being introduced all of the time so really Aussie slang is alive and well.